A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Improving Microstructural and Mechanical Characteristics of AA6061-T6 Composite Joints Formed by Friction Stir Welding Process
In the present investigation, an attempt was made to enhance the microstructure and mechanical properties of a friction stir welded (FSWed) AA6061-T6 joints. This was achieved by refining the microstructure and preventing the coarsening of strengthening precipitates in both the nugget zone (NZ) and the heat-affected zone (HAZ). A novel approach in the field of FSW involved incorporating nanomaterials to create composite joints that could potentially improve joint quality. These composite joints of AA6061-T6 alloy included two different types of nano reinforcement particles, namely silicon carbide (SiC) and boron carbide (B4C), at volume fractions of 5%, 10%, and 15%, and were produced through the FSW. Because all the nano particles were smaller than 1 μm, they prevented grain growth through Zener pinning action, a common occurrence during the recrystallization stage of the FSW process. This limited grain coarsening by restricting the motion of grain boundaries. Microstructure analysis of all the FSWed composite joints revealed a significant level of grain refinement in both the HAZ and NZ. Mechanical tests demonstrated that B4C particles had an advantage in terms of hardness values, while SiC particles were superior in terms of the strength of the FSWed composite joints. The hardness of the composite joints increased proportionally with the volume fraction of reinforcement particles. Conversely, the trend in tensile strength exhibited the opposite behavior. During the FSW process, voids and cracks initiated at the interface between the reinforcement particles and base material (BM) matrix in composite joints with a 15% volume fraction. This was attributed to the non-uniform distribution of nanoparticles and poor interaction, leading to premature joint failure during stress testing. An examination of the fractured surfaces using scanning electron microscopy (SEM) revealed that composite joints with volume fractions between 5 and 10% displayed a combination of ductile and brittle fractures.
Improving Microstructural and Mechanical Characteristics of AA6061-T6 Composite Joints Formed by Friction Stir Welding Process
In the present investigation, an attempt was made to enhance the microstructure and mechanical properties of a friction stir welded (FSWed) AA6061-T6 joints. This was achieved by refining the microstructure and preventing the coarsening of strengthening precipitates in both the nugget zone (NZ) and the heat-affected zone (HAZ). A novel approach in the field of FSW involved incorporating nanomaterials to create composite joints that could potentially improve joint quality. These composite joints of AA6061-T6 alloy included two different types of nano reinforcement particles, namely silicon carbide (SiC) and boron carbide (B4C), at volume fractions of 5%, 10%, and 15%, and were produced through the FSW. Because all the nano particles were smaller than 1 μm, they prevented grain growth through Zener pinning action, a common occurrence during the recrystallization stage of the FSW process. This limited grain coarsening by restricting the motion of grain boundaries. Microstructure analysis of all the FSWed composite joints revealed a significant level of grain refinement in both the HAZ and NZ. Mechanical tests demonstrated that B4C particles had an advantage in terms of hardness values, while SiC particles were superior in terms of the strength of the FSWed composite joints. The hardness of the composite joints increased proportionally with the volume fraction of reinforcement particles. Conversely, the trend in tensile strength exhibited the opposite behavior. During the FSW process, voids and cracks initiated at the interface between the reinforcement particles and base material (BM) matrix in composite joints with a 15% volume fraction. This was attributed to the non-uniform distribution of nanoparticles and poor interaction, leading to premature joint failure during stress testing. An examination of the fractured surfaces using scanning electron microscopy (SEM) revealed that composite joints with volume fractions between 5 and 10% displayed a combination of ductile and brittle fractures.
Improving Microstructural and Mechanical Characteristics of AA6061-T6 Composite Joints Formed by Friction Stir Welding Process
J. Inst. Eng. India Ser. C
Chada, Radhika (author)
Journal of The Institution of Engineers (India): Series C ; 106 ; 227-239
2025-02-01
13 pages
Article (Journal)
Electronic Resource
English
Thermo-mechanical and microstructural issues in dissimilar friction stir welding of AA5086–AA6061
| British Library Online Contents | 2011
| British Library Online Contents | 2009